In industrial factories, energy is used for machinery, lighting, ventilation, cooling, compressed air, and many systems that support production. Consumption levels depend not only on equipment, but also on building orientation, roofing and wall materials, functional zoning, and operating time.
Therefore, energy-saving solutions need to be studied from the factory design stage. Utilizing natural lighting and ventilation, limiting heat transfer through the building envelope, selecting equipment with the right capacity, and organizing technical systems according to actual loads can reduce unnecessary energy use. If adjustments are only made after the building has been completed, investors may need to renovate the architecture, replace equipment, or add measurement systems.
In the article below, BIC analyzes the data that need to be prepared, construction design solutions, and methods for evaluating economic efficiency, helping investors coordinate with consultants or general construction contractors to control operating costs throughout the factory’s service life.
Factory design oriented toward energy savings is a method that coordinates production functionality, architecture, structure, and technical systems to limit unnecessary energy consumption. The solution is developed based on the production line, equipment loads, operating time, and site conditions.
Energy savings do not mean reducing lighting levels, limiting ventilation, or maintaining unsuitable temperatures. The building must still meet requirements for productivity, product quality, working conditions, safety, and the technical standards of each production industry.
The design scope includes building orientation and form, roof and wall structure, insulation materials, and the ability to utilize natural lighting and ventilation. Lighting, cooling, power supply, compressed air, steam, and machinery systems must also be calculated according to actual demand. Investors may also consider renewable energy and monitoring systems to track consumption, detect abnormalities, and adjust operation after handover.
Building orientation, height, form, daylighting ratio, roof and wall structure, and zoning are determined from the factory design stage. These factors directly affect heat gain, lighting demand, and ventilation capacity. Once the building is completed, changes often require structural renovation, envelope modification, or technical system upgrades, creating additional costs and affecting production activities.
A solution with low initial construction cost does not necessarily deliver good investment efficiency. Unsuitable roof insulation, low-efficiency equipment, or poor zoning can increase electricity consumption for many years. Therefore, investors need to evaluate capital expenditure, energy costs, maintenance, and equipment lifespan at the same time.
Data on heat loads, operating time, and production line capacity help the design unit select appropriate lighting, ventilation, cooling, and power supply systems. Calculations from the beginning help prevent undersized equipment or excessive reserve capacity, while providing a clear basis for investors to compare technical options.
Energy efficiency can only be calculated when the design unit has sufficient data on production, equipment, and site conditions. If input information is inaccurate, technical systems may be selected with the wrong capacity or require adjustment when the factory enters operation.
The investor needs to provide the production sequence, number of work shifts, operating time, and load levels at each period. The design unit must distinguish between continuously operating areas and areas used only at certain times in order to properly zone lighting, ventilation, and cooling.
The electrical capacity, operating time, and heat generated by each piece of equipment directly affect electrical loads and cooling demand. Production lines that generate dust, moisture, or exhaust gases also require corresponding collection, treatment, and make-up air systems. Conditions related to temperature, humidity, and cleanliness must also be defined according to product requirements.
Sun exposure direction, wind direction, surrounding buildings, and infrastructure connection capacity form the basis for organizing the master layout. These data help factory design utilize natural conditions in a controlled manner while limiting heat gain and reducing equipment demand.
The investor needs to determine the needs of each stage and the plan for adding production lines. The construction design solution must reserve connection points, space, and infrastructure capacity at a reasonable level. Excessive early overdesign can increase capital costs and cause equipment to frequently operate below optimal load.
Architecture can reduce energy demand before MEP equipment is selected. Effectiveness depends on climate, site conditions, production lines, and environmental control requirements in each production area.
Factory orientation should be studied based on solar radiation, wind direction, surrounding buildings, and production line organization. A suitable solution helps limit roof and wall areas exposed to unfavorable heat gain while supporting daylighting and ventilation. Investors should not apply one fixed orientation approach to every land plot.
Daylight panels, windows, and roof openings should be arranged according to the lighting needs of each area. If used excessively or placed incorrectly, natural light can cause glare and increase indoor heat. Factory design should coordinate natural light with zoned lighting systems to reduce electricity use when outdoor conditions are suitable.
The positions of air intake openings and hot air outlets must create airflow through working areas. This solution is suitable for spaces that do not require strict control of temperature, humidity, dust, or cleanliness. For specialized production areas, air must be treated by mechanical systems before being supplied to the factory.
Roofs and walls are surfaces that receive heat from the external environment. Envelope materials, insulation layers, surface colors, and connection details must be selected according to usage conditions. The construction design dossier must also address gaps, thermal bridges, and water leakage risks to maintain long-term performance.
Areas that generate heat, dust, or operate continuously should be separated from spaces requiring cooling and cleanliness control. Zoning allows each system to serve only the necessary area instead of treating the entire factory uniformly. This arrangement supports operation while reducing equipment capacity and operating time.
MEP systems must be calculated according to production line capacity, operating time, and operating conditions in each area. Selecting equipment based only on maximum capacity can increase capital costs and cause systems to frequently operate in inefficient conditions.
Lighting fixtures should be selected based on illuminance levels, work characteristics, installation height, and production environment. Factory spaces should be divided into independent control zones according to usage time. In suitable areas, daylight sensors or occupancy sensors can help reduce unnecessary lighting time. The design must still ensure visibility and occupational safety.
System capacity should be determined based on heat generated by machinery, workers, roofs, walls, and outdoor air. Different areas may use different solutions such as mechanical ventilation, cooling, or air-conditioning. Treating the entire factory under the same condition can increase loads even when only certain areas require temperature control.
Equipment should be selected according to actual flow rate, pressure, and load profiles. For systems whose demand changes over time, speed controllers help equipment adjust output according to load instead of always operating at a fixed level. Pipework and duct routes also need to be arranged properly to limit losses and support maintenance.
Compressed air and steam systems need to be designed according to pressure, flow rate, equipment locations, and production schedules. Distribution routes that are too long or have many connection points increase the risk of leakage and losses. Investors should zone supply according to demand, arrange inspection points, and consider heat recovery when suitable usage conditions are available.
Transformer stations, distribution boards, and cable routes should be located near major load areas while still meeting safety and operational requirements. Separating production loads from lighting, cooling, and auxiliary loads makes consumption easier to monitor. The construction design dossier should also include justified expansion capacity, avoiding excessive power investment when demand has not yet been formed.
Solar power and monitoring systems can support energy cost reduction, but they are only effective when integrated with factory design and actual operating needs. Investors should prioritize optimizing consumption before determining the scale of additional energy sources.
The solution should consider usable roof area, solar exposure direction, shaded zones, and daytime electricity demand. The roof structure must be checked for loads, maintenance access, and equipment fixing methods. Cable routes, electrical cabinets, waterproofing, roof drainage, electrical safety, and fire prevention and fighting must also be coordinated from the construction design dossier stage.
Installed capacity should not be determined only by roof area. Investors need to compare expected electricity generation with the factory load profile to avoid excessive investment and choose a suitable utilization solution.
The metering system should separate major load groups such as production lines, lighting, cooling, compressed air, and auxiliary areas. Data by work shift, time, and output help businesses identify high-consumption areas, detect abnormal equipment operation, and evaluate the effectiveness of invested solutions.
This information also forms the basis for adjusting operating schedules, maintenance plans, and energy use targets after the factory is handed over.
The effectiveness of a solution should not be evaluated only by the expected reduction in electricity use. Investors need to consider capital expenditure, operating costs, equipment lifespan, maintenance requirements, and impacts on production activities at the same time.
Insulation materials or higher-efficiency equipment often increase part of the initial cost, but can reduce long-term operating expenses. Conversely, low-purchase-price options may consume more electricity, require frequent maintenance, or need early replacement. Evaluation should be based on the total cost over the expected operating period of the building.
All options must use the same production line capacity, operating hours, load levels, energy prices, and environmental conditions. Investors need to clarify the additional cost, expected energy savings, and maintenance costs of each solution. These assumptions must be presented transparently so the results can be checked and updated when data changes.
The payback period is calculated from the additional investment and the annual operating cost that can be reduced. Investors should prioritize solutions with clear data, significant impact, and limited disruption to production. High-capital items can be divided into investment phases. A fixed saving percentage should not be committed when factory design does not yet have sufficient information on equipment, production schedules, and actual operating conditions.
Investors need to evaluate the capability of the implementation unit based on its ability to solve functionality, technical requirements, cost, and operation at the same time. A capability profile is only meaningful when compared with projects in similar production industries and with similar complexity levels.
The design unit needs to understand the relationship among production lines, equipment loads, architecture, structure, and MEP systems. Relevant experience helps identify heat sources, high-energy-consumption areas, and technical requirements that may affect the design solution early.
Architecture, structure, MEP, fire prevention and fighting, and infrastructure must be coordinated using the same data. Investors should check the clash review process, responsibilities of each discipline, and how changes in the production line are handled before construction.
The consultant or general construction contractor needs to compare options based on capital expenditure, expected consumption, lifespan, and maintenance costs. Assumptions regarding loads, operating time, and energy prices must be clearly presented instead of only giving a general saving percentage.
After installation, systems need to be checked under load conditions suitable for production activities. The handover dossier must include operating parameters, user manuals, maintenance plans, and energy monitoring methods. This is the basis for the business to maintain the effectiveness of the solution after the factory enters use.
Energy savings need to be integrated from the factory design stage. Building orientation, roofing and wall systems, zoning, equipment capacity, and control methods all directly affect energy use during production.
Investors need to evaluate solutions based on specific production lines, operating schedules, and site conditions. Investment efficiency is not determined only by initial construction cost, but also by electricity consumption, equipment lifespan, maintenance costs, and expansion capacity. After handover, measurement systems are necessary tools for verifying results and continuing to adjust operations.
BIC provides consulting, construction design, and general construction services for factories according to the actual needs of each business. Investors can contact BIC for site surveys, option analysis, and solutions suitable for production capacity, budget, and long-term energy cost control objectives.
